package com.demo.day717;

import java.util.Random;

/**
 * @Auther: MFM
 * @Date: 2021/7/17 - 07 - 17 - 19:00
 * @version: 1.0
 */

public class Work1 {
    public static void main(String[] args) {
        String basicChar = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        Random random = new Random();
        StringBuilder time = new StringBuilder(String.valueOf(System.currentTimeMillis()));
        for (int i = 0; i < 5; i++) {
            time.insert(2 + 3 * i, basicChar.charAt(random.nextInt(basicChar.length())));
        }
        System.out.println(System.currentTimeMillis());
        System.out.println(time);
    }
}
